3week bloom GDP and BBK

been flowing for about 3 weeks just put in an inline fan so my temp is and humidity is better, i have been thinking of putting some co2 in there with a spray bottle and some like sparkling water, or something like that not sure how or what to do, im thinking really cheap lol ok here are the pics

GDP


here is the new fan


and BBK


and some pics of a seedling called wonder women



and lastly a pic of them all

thanks for any comments, tips, or tricks in advance if it looks good share the rep